While browsing a website, I came across some intriguing elements and decided to investigate further. Here is what the element looked like:
Upon examining the CSS definition:
.entry-meta .date a:before {
content: "\f303";
}
I am aware that images can be embedded using the url property of content, but in this case, there is no URL present. What could be the secret behind this mysterious magic?
Only the icon is actually a unicode character, not an image.
Font-Awesome also uses this technique.
Check out this file:
/* Font Awesome uses the Unicode Private Use Area (PUA) to ensure screen
readers do not read off random characters that represent icons */
.fa-glass:before {
content: "\f000";
}
.fa-music:before {
content: "\f001";
}
.fa-search:before {
content: "\f002";
}
...
That \f303 represents a unique Unicode symbol, acting as a regular text character. It is commonly utilized in special fonts like Font-Awesome, where traditional letters, numbers, and symbols are replaced with vector images.
Take a look at this example using the Font-Awesome library
p:before {
content: "\f143";
font-family: 'FontAwesome';
}
For further information on incorporating Unicode values into your CSS, refer to this useful StackOverflow answer.
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